Sewing machine



FIG. 1 is a front elevational view of a sewing machine showing my design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a perspective view thereof;

FIG. 8 is a perspective view thereof; and,

FIG. 9 is a cross sectional view taken on line 9—9 of FIG. 1. 

The ornamental design for a sewing machine, as shown and described. 